Circular saw



FIG. 1 is a front perspective view of a circular saw showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view taken from the right of FIG. 1;

FIG. 4 is a side elevational view taken from the left of FIG. 1; and

FIG. 5 is a rear elevational view thereof.

The bottom is un-ornamented. 

The ornamental design for a circular saw, as shown and described. 